In my case, my work insists that we use the travel management portal to book flights. You have to justify purchasing FR tickets for example as they don’t appear in the booking portal. So this restricts the choice of carriers …..
These carriers will be based on discounted prices negotiated, or the cheapest ticket price available driven by our bean counters. Or at times, in our case tree huggers. I would need to catch a train at twice the cost of a flight in order to reduce our carbon footprint.
As long as the CAA is happy, my company is happy!!